:root{color-scheme:light;--paper:#f7f2e9;--ink:#39332e;--muted:#73695e;--accent:#b96538;--line:#dfd0bd}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:var(--accent);text-underline-offset:4px}header,main,footer{width:min(1060px,calc(100% - 64px));margin:auto}header{display:flex;align-items:center;justify-content:space-between;padding:30px 0}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-weight:700;font-size:24px}.brand span{font-size:18px;font-weight:500}.intro{padding:34px 0 38px}.eyebrow{color:var(--accent);font-weight:600;font-size:15px;letter-spacing:2px}h1{font-size:clamp(36px,5vw,64px);line-height:1.3;margin:18px 0 22px;letter-spacing:-2px}h1 span{color:var(--accent)}.intro>p:last-child{font-size:20px;color:var(--muted)}section.setup,section.project,.scope{background:#fffcf6;border:1px solid var(--line);border-radius:20px;padding:32px;margin-bottom:32px}.step-heading{display:flex;gap:18px;align-items:flex-start;margin-bottom:24px}.step-heading>span{color:var(--accent);font-size:26px;font-weight:700;line-height:1.5}h2{font-size:24px;line-height:1.4;margin:0 0 6px}.step-heading p{margin:0;color:var(--muted)}textarea{display:block;width:100%;resize:vertical;background:#f6eee0;border:1px solid var(--line);border-radius:12px;padding:20px;color:var(--ink);font-family:inherit;font-size:17px;line-height:1.85;min-height:175px}.actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:20px}button,.secondary{border:0;border-radius:9px;padding:12px 20px;font-family:inherit;font-size:16px;font-weight:600;line-height:1.5;cursor:pointer;text-decoration:none}button{background:var(--accent);color:white}.secondary{background:#f0e5d5;color:var(--ink)}button:focus-visible,a:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #e1a476;outline-offset:4px}.hint{font-size:14px;color:var(--muted);margin:17px 0 0}#copy-status{min-height:26px;color:var(--accent);margin-bottom:0}.demo{padding:10px 0 38px}.demo-images{display:grid;grid-template-columns:1fr 2.1fr;gap:28px;align-items:center}figure{margin:0}figure img{width:100%;height:auto;border:1px solid var(--line);border-radius:12px;display:block}figcaption{margin-top:12px;color:var(--muted);font-size:15px}figcaption strong{color:var(--ink);font-size:22px}.followup{padding-left:20px;border-left:3px solid var(--accent);font-size:19px;margin-top:28px}ol{padding-left:23px}li{margin-bottom:8px}.scope{background:transparent;font-size:15px}.scope h2{font-size:20px}.scope details{border-top:1px solid var(--line);padding-top:14px}.scope summary{cursor:pointer;font-weight:600}footer{display:flex;flex-wrap:wrap;gap:18px;padding:18px 0 36px;font-size:14px}footer span{margin-left:auto;color:var(--muted)}@media(max-width:650px){header,main,footer{width:calc(100% - 36px)}header{padding:20px 0}.brand{font-size:19px;gap:8px}.brand span{font-size:15px}.brand img{width:28px;height:28px}.intro{padding:12px 0 24px}.intro>p:last-child{font-size:17px}h1{letter-spacing:-1px}section.setup,section.project,.scope{padding:22px 18px;border-radius:14px;margin-bottom:24px}h2{font-size:21px}.step-heading{gap:12px}.step-heading>span{font-size:23px}textarea{font-size:16px;min-height:255px;padding:14px}.actions{gap:12px}.actions button,.actions .secondary{width:100%;text-align:center}.demo-images{grid-template-columns:1fr;gap:24px}.demo-images figure:first-child{width:64%;margin:auto}.followup{font-size:17px}footer span{width:100%;margin-left:0}}